Suppose there is a large amount of (weakly interacting) dark matter between us and a distant galaxy. How will this affect our vi
1 answer:
You might be interested in
Answer:
Explanation:
As per Doppler's effect we know that the frequency of the sound that is observed by the detector is the reflected sound
This reflected sound is given as
so we know that the beat frequency is
so we will have
so we have
Answer:
The initial speed of the bullet is .
Explanation:
The collision between bullet and block is inelastic and let suppose that motion occurs on a horizontal surface, so that changes in gravitational potential energy can be neglected. Initially, the intial speed of the bullet-block system can be determined with the help of the Work-Energy Theorem and the Principle of Energy Conservation:
The initial speed of the bullet-block system is:
Now, the initial speed of the bullet is determined by applying the Principle of Momentum Conservation: